A semiconductor device includes: a first power source line for supplying a first voltage; a second power source line for supplying a second voltage; a memory circuit coupled with the first and second power source lines; a first switch which electrically coupling the first power source line with the second power source line and electrically decoupling the first power source line from the second power source line, in response to a control signal; a second switch which electrically coupling the first power source line with the second power source line and electrically decoupling the first power source line from the second power source line, in response to the control signal, wherein a memory circuit includes a memory cell array and a peripheral circuit, wherein a memory cell array includes a plurality of memory cells, the memory cells coupled with the second power source line.